Oil-filtering apparatus



March 16 1926.

L. M. PERRY OIL FILTERING-APPAATUS Filed Deo. 19, 1923 gwuentoz Z630 En?,

Patented Mar. 16, 1926,

NITED s'r'ies LEO IVI. PERRY, OF ST. HELEN, IVIICIIIGAN.v

OIL-FILTERING APLARATUS.

Application filed December 19, 1923. Serial No. 681,487.

To all whom t may concern;

Be it known that I, LEO M. PERRY, a citizen of the United States, residing at St. Helen, in the county of Roscommon and State of Michigan, have invented certain new and useful Improvements in Oil-Filtering Apparatus, of which the following is a specification, reference being had therein i to the accompanying drawings. l()

apparatus and my invention aims to provide an apparatus by which lubricating oils and the like may be expediently filtered so that such oils may be used over and over again. It is in this connection that the filtering apparatus may be advantageously used for removingdirt, grit and foreign matter from the lubricating'oils which have been used in connection with an internal combustion engine, it being a well known fact that the crank cases of automobile engines are drained, from time to time, and the oil usually thrown away. This oil I intend to save, clean it, and again use it, and continue to do so until its lubricating properties are practically nil.

My invention further aims to provide an oil filtering apparatus wherein a series of tanks or compartments are placed in communicating relation so that oil may flow from one compartment to another and in doing so pass through filtering beds which are adapted to remove foreign matter or provide a removable surface upon which sediment may collect. The arrangement of the compartments and filtering beds in such that a circulation of oil will be maintained in all compartments vallowing ythe lighter oils to pass off quickly leaving the residue in the filtering beds or a sediment thereon, and from time to time the apparatus may have its filtering beds renewed and the interior of the apparatus flushed and thoroughly cleansed. To do this provisionis r made for maintaining the cleaned or liltered oil in the separa-te compartment or reservoir from which it may be easily removed, and provision is made to automatically control the supply of unfiltered oil to the iiltering apparatus, so that the apparatus may be used and operated without constant attention.

'My inventin. will be hereinafter speci This invention relates to an oil filtering,

cally described and then claimed, and reference will now be had to the drawing, wherein- Figure 1 isa front elevation of the oil filtering apparatus, partly broke away and partly in section, and

Fig. 2 is a plan of the same.

- The filtering apparat-us comprises an oblong tank having a bottom wall 1,'end walls 2 and 3, a Vrear wall 4, a front wall 5, and a detachably top wall or cover 6. The tank may be supported by a plurality of legs 7 and at one end of the tank the walls 3, 4 and 5 are of greater height than the remaining walls and cooperate with a transverse -wall 8 in providing an inlet casing or compartment 9' having a detachable cover 10. As a continuation of the transverse wall 8 there is a partition 11 connecting the walls 4 and 5 and extending in proximity to the bottom wall 1. The walls4 and 5 are connected by additional transversely disposed partitions 12, 13 and 14, these partitions varying in height with the partition 12 the full depth of the tank: the par'- tition 13 approximately half the depth of the tank and connected to the partition 12 by a transverse inclined wall 15, while the partition 14 is approximately one-third of the depth of the tank and is connected to the partition 13 by a transverse inclined bottom wall 16.

The arrangement ofthe partitions 11, and 14 inclusive and the bottom wallsl and 16 is such as to provide a plurality of progressively stepped communicating filtering compartments 17, 18, 19 and 20, also a storage or clean oil compartment 21 which occupies approximately one-half of the tank.

Extending into the casing 9, preferably through the cover ,10. is an oil inlet pipe 22 and on the inner end of said pipe is a cage 23 for a control valve'24 connected by links 25 or other means to arock crank shaft 26 supported by the wall 4 of the tank. v The outer end of the rock shaft 26 has a long crank 27 connected by a reach rod 28 to another rock crank shaft'29 supported by the wall 4 and a bearing bracket 3 0 carried by the inner face of said wall. The inner end of the rockshaft 29 is provided with a long crank 31 loeeely connected. to n. Heat Cil rod 32 provided with a float or buoyant body 33, said fioat rod being guided by a bracket 34 carried by the Wall 2.

T he fi'oat 33 is located in the upper part of the storage compartment 2l and the level of cleaned oil in said compartment will govern the posit-ion of the valve 2a and the inlet of unclean oil. The supply of oil of the pipe 22 is preferably regulated so that the oil will drip into the casing 9 and the float actuated valve is employed as a safety factor. u

` In the 'filtering ycompartment y1,7,beloiv the 'casing 9, are 'placed superposed detachable screens 35, preferably made of metal and of such a mesh as to aii'ord a support,

ing surface for a filtering bed 36 on each screen. The filtering beds, may be of any Well known filtering material, such as min eral Wool, ivood shavings or the like and in this particular compartment the filtering beds may be comparatively coarse so as to remove iron filings, metallic particles, and other `foreign coarse matter that may be carried into the 'compartment along with the 'supply of oil.

In the compartment 18, in proximity to the bottom thereohis placed a detachable screen 37 and a filtering bed 38, both of which may be a flew degrees finer than the vscreens 35 and the filtering beds '3o. Below the screen 37 and supported bythe Walls t and 5 and the partition il .in an inclined deflec'tor 39 and oil fi'oiving freni the bottom of the compartment ll', under thjepartition 11, is deflected towards the partition 1,2.to pass upwardly through the screen 37 and the lilteringbed 38, taking a path of travel as indicated by the arrov'vs in thecompartment 18, Fig. l. The path of travel is somewhat circuitou's, and the circulation maintained will permit the lighter ollsto pass through an opening 40, under a defiecto'r al, in the compartment 19, While the heavier oils will tend to accumulate above the filtering bed so that heavy particles -of matter in the oil may settle on the filtering bed,

In kthe compartment i9, 'above the defiector stl is a screen t2 and a filtering bed' 43, both 'of which may be finer than previously mentioned screens or filter beds. The compart ment 19 communicates with the compartment 20 through an opening Li4: at a defiector in the lcompartment 20, and above the dei-iector 453 is a fine screen 4to; In some instances the filtering bed may be placed on this screen and a finer or smaller screen t7 is arranged in the upper part of the compartment 2l, preferably on the same level as the screen fifi.

The partition i4 is provided with a pipe e8 establishing communication between the `compartments 2O and 2l and the compartment 2l communicates with a sight gauge 4.9 carried by the front Wall 5.

lean oil may be obtained from theI lower part of the compartment 2l by a faucet 5t and foreign matter may be drained from 'the bottom of the compartmentsI l? and lli through a valved drain pipe l carried by the bottom Wall l of the tank. lilith 'the bottom Walls l5 and 1G inclined it is obvious that oil will drain into the compartments lli and respectively and any foreign matter held in suspension by the oil Will accumulate on or in Ithe filtering beds 38 and i3, and by removing the covers G and l0 the screens and filtering beds may be removed, cleansed or renewed. It is at such time that the interior ofthe compartments ii' to 2() '55 may be 'cleansed by using lerosei'ie or some detergent which will attract such films of fiith as have accumulated on the Walls 'of the various compartments, and allot this may be a'ccoi'npiishe'd particularly 'when the level of cleaned oil in the compartment 2l is be ijoiv the inlet pipe a8 'of said compartments. The float will retain the valve 2sclosed Aand the oil in. the conipartments l? to 2U inclusive may be maintained throughout rand said compartments thoroughly cleaned and yplaced in the best ofy condition.

From the foregoing it Will be observed that the filteringv of oil is accomplished by the specific gravity 'of foreign matter in the oil.V The fine foreign matter may be held back by means of filtering beds and such foreign matter that does pass through the beds has a chance to accumulate on the beds as a 'sediment due to the slow circulating 1 CTI movement of oil in the compartments of the filtering apparatus. Any suitable means may be employed for maintaining an overhead supply of unclean `oil for the filtering apparatus, and With such an apparatus located at 'an automobile supply station it is possible to save the drained lubricating oils from automobiles, filter it 'and again use it.

.The filteringapparatus, on a` small scale,

may be used by individuals or indi\`*iduals may reclaim their lubricating oils after-having` been filtered at a supply station.

It is thought that .the utility and operation of the filtering apparatus Will be apparent Without further description, and while in the drawing there is illustrated a preferred embodiment of my invention it tor be understood that thestructural elements are susceptible to such variation und modifications as fall Within the scope o" the appended claim.

That I claim is Anoil filtering apparatus comprising a tank having an inlet at one end and an outletV at its opposite end, partitions in said tank forming a storage compartment and. a plurality of filtering compartments, the storage compartment being approximately half the length of saidltank and extending under three of the filtering conipartmenis,

all. olf said filtering compartments being piocompartments with the .filtering means in gressively stepped in depth with the lower the progressively stepped compartments in ends of said liltering compartments comproximity to the inclined bottom walls 10 municating` lWith one another and two of the thereof.

filtering compartments above the storage In testimony whereof I aliX my signacompartment provided With inclined bottom ture. i Walls, and filtering meansin said liltering LEO M. PERRY. 

